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Benchmarking Highly Entangled States on a 60-Atom Analogue Quantum Simulator by Adam L. Shaw; Zhuo Chen; Joonhee Choi; Daniel K. Mark; Pascal Scholl; Ran Finkelstein; Andreas Elben; Soonwon Choi; Manuel Endres is a Physics and Astronomy article available to read on EtoBox.

What is Benchmarking Highly Entangled States on a 60-Atom Analogue Quantum Simulator about?

Quantum systems have entered a competitive regime in which classical computers must make approximations to represent highly entangled quantum states^1,2^. However, in this beyond-classically-exact regime, fidelity comparisons between quantum and classical systems have so far been limited to digital quantum devices^2–5^, and it remains unsolved how to estimate the actual entanglement content of experiments^6^. Here, we perform fidelity benchmarking and mixed-state entanglement estimation with a 60-atom analogue Rydberg quantum simulator, reaching a high-entanglement entropy regime in which exact classical simulation becomes impractical. Our benchmarking protocol involves extrapolation from comparisons against an approximate classical algorithm, introduced here, with varying entanglement limits. We then develop and demonstrate an estimator of the experimental mixed-state entanglement^6^, finding our experiment is competitive with state-of-the-art digital quantum devices performing random circuit evolution^2–5^. Finally, we compare the experimental fidelity against that achieved by various approximate classical algorithms, and find that only the algorithm we introduce is able to keep

Who reads Benchmarking Highly Entangled States on a 60-Atom Analogue Quantum Simulator?

Author

Adam L. Shaw; Zhuo Chen; Joonhee Choi; Daniel K. Mark; Pascal Scholl; Ran Finkelstein; Andreas Elben; Soonwon Choi; Manuel Endres

Publisher

Nature Publishing Group UK

Published

2024

Language

EN

Field

Physics and Astronomy (Physical Sciences)